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math.OA2021
Fell algebras, groupoids, and projections
Robin J. Deeley, Magnus Goffeng, Allan Yashinski
Examples of Fell algebras with compact spectrum and trivial Dixmier-Douady invariant are constructed to illustrate differences with the case of continuous trace -algebras. At…
math.KT2021
A counterexample to the HK-conjecture that is principal
Robin J. Deeley
Scarparo has constructed counterexamples to Matui's HK-conjecture. These counterexample and other known counterexamples are essentially principal but not principal. In the present…